Answer:
The positive qualities of the Devil
Explanation:
Ben Wade represents all of the Devil´s power that includes an ´angelical´ side, capable of redemption. This is clearly shown in the beginning of the movie where Wade decides not to kill a Pinkerton agent although (in the next scene) he obviously doesn´t have any moral problems killing people that present a possible threat to him or his gang.
Furthermore Ben Wade is handsomly dressed, talented and seductive.
